How to Fix the Error: listen EADDRINUSE in Node.js
In this tutorial, we are going to learn about how to solve the Error: listen EADDRINUSE: address already in use in Node.js.
When we run a development server of react or other apps, sometimes we will see the following error in our terminal.
Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
at Server.setupListenHandle [as _listen2] (net.js:1306:16)
at listenInCluster (net.js:1354:12)
at GetAddrInfoReqWrap.doListen [as callback] (net.js:1493:7)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:65:10)
Emitted 'error' event on Server instance at:
at emitErrorNT (net.js:1333:8)
at processTicksAndRejections (internal/process/task_queues.js:81:21) {
code: 'EADDRINUSE',
errno: 'EADDRINUSE',
syscall: 'listen',
address: '127.0.0.1',
port: 3000
}This error tells us, the port number we are trying to run a server is already in use.
To solve this error, we need to close the program that is using this port or try to use a different port.
If you don’t know, which program is using that port then you can use the following command to kill the all node processes currently running.
killall -9 node- Share:
